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A gas enclosed in a vessel has pressure ...

A gas enclosed in a vessel has pressure P, volume V and absolute temperature T, write the formula for number of molecule N of the gas.

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From `PV = n RT = N/(N_A) RT`
`N=(PVN_(A))/(RT) =(PV)/(kT)`
where `k=R/(N_A)` = Boltzmann constant.
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